One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,6)(3,7,8,5)(17,18,22,31,24,20,23,26)(19,27,28,25,30,32,29,21)(1,3,4,8)(2,5,6,7)(10,14)(12,15)(17,19,24,30)(18,25,20,21)(22,29,23,28)(26,32,31,27)(9,10)(11,12)(13,14)(15,16)(17,20,24,18)(19,25,30,21)(22,31,23,26)(27,29,32,28)(9,11,13,16)(10,15,14,12)(17,21,24,25)(18,19,20,30)(22,27,23,32)(26,29,31,28)(9,12,13,15)(10,11,14,16)(17,22,24,23)(18,26,20,31)(19,28,30,29)(21,32,25,27)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.